Silicon Valley is having a major meltdown over Donald Trump’s victory in the presidential election.

Top tech titans who had blasted Trump’s positions on immigration, women’s rights, the environment and taxes vented their despair on social media as it became clear in the wee hours of Wednesday that the Republican would defeat Hillary Clinton.

Zynga Chief Executive Mark Pincus compared the US in the wake of Trump’s victory with Germany in the 1930s.

“Is this what it felt like when people first realized Hitler could actually take power?” the 50-year-old tweeted.

Y Combinator boss Sam Altman said in a tweet that the Trump win “feels like the worst thing to happen in my life.” The tweet was taken down.

Venture capitalist Shervin Pishevar, who backs the Hyperloop One high-speed train startup, declared late Tuesday, as Trump started to pull away from Clinton, that he would fund a campaign for California to secede from the US.

“If Trump wins I am announcing and funding a legitimate campaign for California to become its own nation,” Pishevar tweeted.